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Don't know if it will work on your. I have a jWin JD-VD141 and the code works. Have the DVD tray open (means ejected) then press 9735. A menu will pop up and choose Regions 0 then exit. You DVD player should play DVD from all regions.

there is a circuit in the color section to put the tv to black and white if the color subcarrier is missing from the broadcast signal.
it is called a color killer and needs to be adjusted.
it is for a technician to do.
it operates off the 3.58mhz color subcarrier.

Are you using the composite input on your TV? If so, you might have plugged the input cable into one of the other video outputs on the DVD player. There may be a switch on the back of the DVD player to select the output format.

its the new disc setup for dvd's there using a new dvd conversion set up disc old dvd players just dont read the new dvd's just the other night did what you did but i went out and bought a new dvd player gotta keep up with technology
if you have warranty return for update or buy new technology it sucks i know but just put old dvd in another room have fun with the old one when you buy the new one

If I understand your post/description, the DVD plays OK except it is in Black & White. If so, change setting from PAL to NTSC or vice versa depending on the region you are in. US operates on NTSC, Most of Europe is PAL.

Hope that this be of help/idea. Pls post back how things turned out or should you need additional information.

Press case lid where it attaches to player. If this makes unit react you have a defective lid switch. You can probably put some weight over it to hold lid down and it will operate. Otherwise switch must be repaired